Positioning
EDIT: Im not too good at making those diagrams

----------------------------
|xxxxx                          |
|T-P-MDx                    |
|xxxxx                          |
|xxxxx                          |
|xxxxx                          |
|RD/Hxx                      |
|xxxxxx                        |
-----------------------------

T=tank
P=prince
RD=Ranged dps
H=healers
MD=meele dps
X=FILLER

with this positioning on the left wall you can usually do the fight with no infernals dropping on you unless your VERY unlucky

tank tanks him with his back to the wall so he doesnt get knocked back

ranged dps/healers stand at max range so they dont have to worry about dieing from enfeeble+nova

meele dps stands at max range and maybe brings along some drums of speed/speed pots so they can gtfo when hes about to nova

save your long cooldowns for the second phase

when the axes come out have 1 healer focused on the tank 1 focused on healing people that are getting axed and 1 switching between the two

enjoy your epics